HONR 1034 Lecture Notes - Lecture 1: Photosynthesis, Tetrapyrrole, Ferrous
Document Summary
C. 98. 5% of oxygen in blood is bound to hemoglobin. 4. 4 sites in the plane are bound to globin chains, 2 perpendicular are available. A. heme belongs to the class of pigments known as porphyrins (cyclic tetrapyrroles): B. heme composed of 4 pyrroles linked by methylene bridges each bound to a central. B. oxygen-carrying molecules; overcome limitations imposed by the low solubility of. 1. the heme group is called a prosthetic group . 2. a protein without its prosthetic group is called an apoprotein . 3. each heme has 6 coordination sites: 4 within the plane of protoporphyrin and 2. I. two principal mechanisms for supplying cells with oxygen (in vertebrates) oxygen in water. Heme, chlorophyll (photosynthesis), (cyano)cobalamin (vitamin b12) ferrous iron (fe2+) perpendicular to the plane for oxygen binding. Iv. cooperativity; phenomenon in biology displayed by substances that have multiple bidning sites, such as hemoglobin and become active.
